Electric heater



- c. E. BARR ELECTRIC HEATER Filed April; 18. 1921 1 NV ENTOR.

8 ll I v Patented Sept. 11, 1923.

UNITED STATES PATENT OFFICE.

CLARENCE E. BARR, OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-FOURTH T0 FLORENCE KING ALLEN, ONE-FOURTH TO WILLIAM H. MERVIN, AND ONE-HALF TO THOMAS E. JACKSON, ALL OF DETROIT, MICHIGAN.

ELECTRIC HEATER.

Application filed April 18, 1921.

To all whom may concern Be it known that I, CLARENCE E. BARR, a citizen of the United States, and residing at Detroit, in the county of Wayne and State of Michigan, have invented a new and Improved Electric Heater, of which the following is a specification.

This invention relates to ortable electric heaters of relatively small size in which the heating element is'entirely enclosed, and its object is to provide a device of this character which is simple in construction, of good heating capacity, and which is not liable to get out of order.

This invention consists of a shell and a perforated top and bottom therefor, of a series of upright supports of non-conducting material such as asbestos board which is little affected by heat, said supports being connected at their inner edges and notched along their outer edges, and resistance wire wound around in the notches at the top and following around in the notches down the side edges of the supports.

It further consists inthe details of construction illustrated 'in the accompanying drawing and particularly pointed out in the claims.

In the drawing, Fig. 1 is an elevation of the supports for the heating wire and a central vertical section of the shell of this improved heater. Fig. 2 is a section of the heater on the line 2-2 of Fig. 1. Fig. 3 is a plan of the wire supports. Fig. 4 is a perspective of a preferred connector for the wire sup orts.

Similar re erence characters refer to like parts throughout the several views.

The shell 1 of this heater is preferably cylindrical and united to the perforated top 2 b any desired means, small bolts 3 exten ing through the shell and the flange 4 of the head being shown. A perforated base 5 formed with legs 6 and a flange 7 may be secured to the shell by the screws 8. Any desired number of perforations of any desired size and shape maybe formed in the head and bottom, but I prefer to form the perforations 9 in the bottom of somewhat more total area than the perforations 10 in the top While any desired number of supports '12 may be employed I prefer four and I Serial No. 462,130.

prefer to secure them radially together by means of the connectors formed of pairs of leaves 13united at their middle points and formed with struck-up tongues 14 adapted to extend through holes in the supports 12, as shown in Fig. 2, and with the ends of these tongues bent down against the supports to hold them in position. The outer upright edges of these supports are. preferably concave.

The outer vertical edges and the top edges of these supports are formed with the notches 15 and 16 to receive the coiled resistance wire 18, which is preferably looped in the notches 16 (Fig. 3) intermediate its ends, then wound around in the upper notches 16 and then wound around in the side notches 15 until its ends are attached to the binding screws 19 and 20. A cable 22 has its wires 23 and 24 attached to these binding screws to supply current to the resistance wire.

It will be noticed that the greater por-v up heat from the lower windings, but the desired high temperature is imparted to the air by the more closely wound coils at the upper ends of the supports. Because of the concave outer edges of the supports, there is less possibility of air passing up without being heated.

The sizes, proportions and details of the various parts of this heater may all be changed by those skilled in the art .Without epartmg from the spirit of my invention as set forth in the following claims.

I claim 1. In a heater, the combination of a cylindrical shell,a perforated top and bottom therefor, a series of radial supports of nonconducting material within the shell having notches in their outer vertical edges, and a coiled heating wire wound around the supportand held in these notches, the outer upright edges of the supports being concave.

2.. In an electric heater, the combination of a shell, a top and a bottom therefor, a series of flat supports of non-conducting material radially arranged and connectors between them, said supports having notches in their outer up 'ht edges and hop edges, a of supnorts 0i? non-00nd" M ilestmg W 011ml around 121 SEH'CL upper "Ia-chem is each ctncr so as from: and, 5122 sd cs. bmdmg screws mounted m 1 comm-0n verb sums and having concave 2 'd su moms to which the lower ends of the cd es *arovided with notches and a .ilcstin S u t: i J o heahng we are attached, and conductors element Wound mic said notches.

for clectnc current attached to sand screws.

l nsneafczgthe combination 0:" a scrics CLAREIJCE 

